Built this tiny quad a few weeks ago. It's based on multiwii firmware, controlled by flysky protocol.
Specs.
Motor-6*10mm coreless
Battery-100mAh lipo
RX-FlySky 8ch
Microcontroller- atmega328p(pro mini)
Gyro+acc-mpu6050
AUW is around 15g, close to that of a CX-10!